CN116420233A - Solar cell unit and solar cell module - Google Patents
Solar cell unit and solar cell module Download PDFInfo
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- CN116420233A CN116420233A CN202180075174.2A CN202180075174A CN116420233A CN 116420233 A CN116420233 A CN 116420233A CN 202180075174 A CN202180075174 A CN 202180075174A CN 116420233 A CN116420233 A CN 116420233A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/02—Details
- H01L31/0224—Electrodes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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Abstract
Provided is a solar cell (1) capable of adjusting the length of a solar cell string. In a solar cell (1) according to one aspect of the present invention, a first semiconductor layer (20) includes: a plurality of first main semiconductor sections (21); and a first terminal semiconductor section (23) connected to the other side of the first direction of the first collective semiconductor section (22), wherein the second semiconductor layer (30) has a plurality of second main semiconductor sections (31) and second collective semiconductor sections (32), and wherein the first electrode pattern (40) has: a plurality of first finger electrodes (41) stacked on the first main semiconductor section (21) so as to extend in a first direction; a first bus bar electrode (42) laminated on the first collective semiconductor section (22); and a first pad electrode (43) which is laminated on the first terminal semiconductor section (23) and is connected to the first bus bar electrode (42), wherein the second electrode pattern (50) has: a plurality of second finger electrodes (51) stacked on the second main semiconductor section (31) so as to extend in the first direction; and a second bus bar electrode (52) stacked on the second collective semiconductor portion (32).
Description
Technical Field
The present invention relates to a solar cell unit and a solar cell module.
Background
As an energy source with a small environmental burden, the use of solar cells is expanding. For example, patent document 1 proposes a solar cell module mounted on a roof of an automobile. In general, a solar cell module is manufactured using a plurality of solar cell strings in which a plurality of solar cell units are arranged in a row and connected to each other. Since the installation area of an automobile or the like is limited, a solar cell module is required to have high photoelectric conversion efficiency in order to obtain sufficient electric power. Therefore, it is desirable to select the length of the solar cell string in accordance with the size of the installation site so that the effective area of the solar cell that can contribute to photoelectric conversion becomes large.
The shape and size of a place where the solar cell module can be installed in the automobile are different for each automobile model. Therefore, in order to improve the effective photoelectric conversion efficiency of the solar cell module, it is necessary to optimize the length of the solar cell string for each automobile model. However, the length of the solar cell string can generally only be changed by adjusting the number of solar cells. If the design of the solar cell is changed for each automobile model, the photoelectric conversion efficiency of the solar cell module can be maximized, but such a change in design greatly increases the cost of the solar cell module.
Patent document 1: japanese patent application laid-open No. 2017-188584.
Disclosure of Invention
The invention provides a solar cell unit capable of adjusting the length of a solar cell string and a solar cell module with a large length of the solar cell string.
A solar cell according to an aspect of the present invention includes: a semiconductor substrate; a first semiconductor layer and a second semiconductor layer formed on the back surface of the semiconductor substrate and having different conductivity types; and a first electrode pattern and a second electrode pattern, wherein the first electrode pattern is laminated on the first semiconductor layer, the second electrode pattern is laminated on the second semiconductor layer, and the first semiconductor layer comprises: a plurality of first main semiconductor portions extending in a first direction and arranged at intervals in a second direction intersecting the first direction; a first semiconductor aggregate portion disposed on one side of the plurality of first main semiconductor portions in the first direction and extending in the second direction; and a first terminal semiconductor portion connected to the other side of the first semiconductor portion in the first direction, the second semiconductor layer having: a plurality of second main semiconductor portions extending in the first direction and alternately arranged with the first main semiconductor portions in the second direction; and a second aggregate semiconductor portion disposed on the other side of the plurality of second main semiconductor portions in the first direction and extending in the second direction, the first electrode pattern including: a plurality of first finger electrodes stacked on the first main semiconductor portion so as to extend in the first direction; a first bus bar electrode laminated on the first collective semiconductor section; and a first pad electrode stacked on the first terminal semiconductor portion and connected to the first bus bar electrode, wherein the second electrode pattern includes: a plurality of second finger electrodes stacked on the second main semiconductor portion so as to extend in the first direction; and a second bus electrode stacked on the second collective semiconductor portion.
In the solar cell, the first semiconductor layer may further include a first intermediate semiconductor portion extending in a second direction so as to connect an end portion of the first main semiconductor portion on the first direction side and the first terminal semiconductor portion, and the first electrode pattern may further include a first bypass electrode stacked on the first intermediate semiconductor portion and connecting the first finger electrode and the first pad electrode.
In the solar cell, the second semiconductor layer may further include a second terminal semiconductor portion, the second terminal semiconductor portion may be connected to the first direction side of the second aggregate semiconductor portion, the second electrode pattern may further include a second pad electrode, and the second pad electrode may be stacked on the second terminal semiconductor portion and connected to the second bus bar electrode.
In the solar cell, the second semiconductor layer may further include a second intermediate semiconductor portion extending in a second direction so as to connect an end portion of the second main semiconductor portion on the first direction side and the second terminal semiconductor portion, and the second electrode pattern may further include a second bypass electrode stacked on the second intermediate semiconductor portion and connecting the second finger electrode and the second pad electrode.
A solar cell module according to an aspect of the present invention includes a plurality of solar cell strings each including: a plurality of solar cell units; and an internal connector for connecting the solar cells, wherein an end portion of the solar cell on one side in the first direction is arranged to overlap a front surface side of an end portion of the adjacent solar cell on the other side in the first direction, and the internal connector connects the first pad electrode of the solar cell overlapping on the front surface side and the second electrode pattern of the solar cell overlapping on the back surface side.
According to the present invention, a solar cell unit capable of adjusting the length of a solar cell string and a solar cell module having a large length of a solar cell string can be provided.
Drawings
Fig. 1 is a rear view of a solar cell according to an embodiment of the present invention.
Fig. 2 is a cross-sectional view of the solar cell unit of fig. 1 taken along line A-A.
Fig. 3 is a rear view of a solar cell string having the solar cell unit of fig. 1.
Fig. 4 is a cross-sectional view of a solar cell module including the solar cell string of fig. 3.
Detailed Description
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the same or corresponding portions are denoted by the same reference numerals in the drawings. For simplicity, illustration of components, reference numerals, and the like may be omitted, and in this case, reference is made to other drawings. In addition, for convenience, the shapes and sizes of various components in the drawings are adjusted to be easily observed.
< solar cell >)
Fig. 1 is a rear view showing a solar cell 1 according to an embodiment of the present invention. Fig. 2 is a cross-sectional view of the solar cell unit 1. The solar cell 1 includes: a semiconductor substrate 10; the first semiconductor layer 20 and the second semiconductor layer 30 are formed on the back surface of the semiconductor substrate 10 and have different conductivity types; and a first electrode pattern 40 and a second electrode pattern 50, the first electrode pattern 40 being laminated on the first semiconductor layer 20, the second electrode pattern 50 being laminated on the second semiconductor layer 30. In fig. 1, the first electrode pattern 40 and the second electrode pattern 50 are hatched for easy understanding.
The semiconductor substrate 10 can be formed of a crystalline silicon material such as single crystal silicon or polycrystalline silicon. Further, the semiconductor material may be formed of other semiconductor materials such as gallium arsenide (GaAs). The semiconductor substrate 10 is, for example, an n-type semiconductor substrate in which a crystalline silicon material is doped with an n-type dopant. As the n-type dopant, phosphorus (P) may be mentioned, for example. The semiconductor substrate 10 functions as a photoelectric conversion substrate that absorbs incident light from the light receiving surface side to generate photocarriers (electrons and holes). By using crystalline silicon as a material of the semiconductor substrate 10, dark current is relatively small, and a relatively high output (output stable regardless of illuminance) is obtained even when the intensity of incident light is low.
The first semiconductor layer 20 and the second semiconductor layer 30 are formed in substantially complementary shapes on the back surface of the semiconductor substrate 10, and have mutually different conductivity types. The first semiconductor layer 20 and the second semiconductor layer 30 induce and collect carriers having different polarities from each other from the inside of the semiconductor substrate 10.
Specifically, the first semiconductor layer 20 can be formed of a p-type semiconductor, and the second semiconductor layer 30 can be formed of an n-type semiconductor. The first semiconductor layer 20 and the second semiconductor layer 30 are formed of, for example, an amorphous silicon material containing a dopant imparting a desired conductivity type. The P-type dopant may be boron (B), for example, and the n-type dopant may be phosphorus (P), for example.
The first semiconductor layer 20 has: the first main semiconductor portion 21 extends in the first direction and is arranged with a gap therebetween in a second direction intersecting the first direction; a first collective semiconductor portion 22 disposed on one side of the plurality of first semiconductor portions in the first direction, connected to a part of the first main semiconductor portions 21, and extending in the second direction; a first terminal semiconductor portion 23 connected to the other side of the first direction of the first collective semiconductor portion 22; the first intermediate semiconductor portion 24 extends in the second direction so as to connect the first terminal semiconductor portion 23 and an end portion of the first main semiconductor portion 21 on the first direction side, which is not directly connected to the first collective semiconductor portion 22; and a first extension semiconductor portion 25 extending from one end portion of the first main semiconductor portion 21 on the other side in the first direction to protrude in the second direction.
The second semiconductor layer 30 has: a plurality of second main semiconductor portions 31 extending in the first direction and arranged alternately with the first main semiconductor portions 21 in the second direction; a second collective semiconductor portion 32 disposed on the other side of the plurality of second main semiconductor portions 31 in the first direction, connected to a part of the second main semiconductor portions 31, and extending in the second direction; a second terminal semiconductor portion 33 connected to one side of the second collective semiconductor portion 32 in the first direction; a second intermediate semiconductor portion 34 extending in the second direction side by side with the first extension semiconductor portion 25 so as to connect the second terminal semiconductor portion 33 and an end portion of the second main semiconductor portion 31 on the other side in the first direction, which is not directly connected to the second collective semiconductor portion 32; and a second extension semiconductor portion 35 extending from one end portion of a part of the second main semiconductor portion 31 in the first direction side to the first intermediate semiconductor portion 24 in the second direction.
The first electrode pattern 40 is provided to take out charges from the first semiconductor layer 20, and the second electrode pattern 50 is provided to take out charges from the second semiconductor layer 30. The first electrode pattern 40 and the second electrode pattern 50 are stacked so that a margin (margin) is left at the outer edge portions of the first semiconductor layer 20 and the second semiconductor layer 30 in order to prevent a short circuit.
The first electrode pattern 40 and the second electrode pattern 50 can be formed by, for example, etching of a metal layer, printing and firing of a conductive paste, or the like. The first electrode pattern 40 and the second electrode pattern 50 may be a laminate of a transparent electrode layer made of, for example, ITO (Indium Tin Oxide), zinc oxide (ZnO), or the like and a metal electrode layer mainly made of metal, which is laminated on the first semiconductor layer 20 and the second semiconductor layer 30.
Specifically, the first electrode pattern 40 has: a plurality of first finger electrodes 41 each stacked on the first main semiconductor portion 21 so as to extend in the first direction; a first bus bar electrode 42 stacked on the first collective semiconductor portion 22 and connected to one end of a part of the first finger electrode 41 in the first direction; a first pad electrode 43 stacked on the first terminal semiconductor portion 23 and connected to the first bus bar electrode 42; a first bypass electrode 44 stacked on the first intermediate semiconductor portion 24 and connecting the first finger electrode 41 and the first pad electrode 43; and a first extension electrode 45 stacked on the first extension semiconductor portion 25 and connected to the first finger electrode 41.
The second electrode pattern 50 has: a plurality of second finger electrodes 51 stacked on the second main semiconductor portion 31 so as to extend in the first direction; a second bus bar electrode 52 stacked on the second collective semiconductor portion 32 and connected to one end of a part of the second finger electrodes 51 on the other side in the first direction; a second pad electrode 53 stacked on the second terminal semiconductor portion 33 and connected to the second bus bar electrode 52; a second bypass electrode 54 stacked on the second intermediate semiconductor portion 34 and connecting the second finger electrode 51 and the second pad electrode 53; and a second extension electrode 55 stacked on the second extension semiconductor portion 35 and connected to the second finger electrode 51.
The first main semiconductor portion 21 and the second main semiconductor portion 31 occupy a large area in the first semiconductor layer 20 and the second semiconductor layer 30. By forming the first main semiconductor portion 21 and the second main semiconductor portion 31 in complementary stripe shapes, the distance of movement of carriers in the semiconductor substrate 10 can be reduced, and thus the photoelectric conversion efficiency of the solar cell 1 can be improved.
By providing the first and second collective semiconductor portions 22 and 32 in which the first and second bus bar electrodes 42 and 52 are stacked, electric charges can be efficiently extracted from the first and second main semiconductor portions 21 and 31 with a relatively simple structure.
By providing the first terminal semiconductor portion 23 and the first pad electrode 43, when the ends of the plurality of solar cells 1 in the first direction are arranged to overlap each other, even if the overlapping width of the solar cells 1 is increased and the ends of the adjacent solar cells 1 are covered with the first bus bar electrode 42, electric power can be output from the first pad electrode 43.
Further, by providing the first pad electrode 43 and the second pad electrode 53, the width of the first bus bar electrode 42 and the second bus bar electrode 52 in the first direction can be reduced, and therefore, electric charges can be efficiently extracted from the semiconductor substrate 10. Therefore, by providing the first pad electrode 43 and the second pad electrode 53, the area of the first main semiconductor portion 21 and the second main semiconductor portion 31 can be increased, and the photoelectric conversion efficiency of the solar cell 1 can be improved.
Even when the first intermediate semiconductor portion 24 and the second intermediate semiconductor portion 34, and even the first bypass electrode 44 and the second bypass electrode 54 are provided, the resistance from the first main semiconductor portion 21 and the second main semiconductor portion 31 to the first pad electrode 43 and the second pad electrode 53 outputting electric power can be reduced even when the widths of the first bus bar electrode 42 and the second bus bar electrode 52 in the first direction are reduced, and therefore, internal loss of the solar cell 1 can be suppressed.
The first and second extension semiconductor portions 25 and 35 and the first and second extension electrodes 45 and 55 compensate for the decrease in the area of the first and second main semiconductor portions 21 and 31 due to the formation of the first and second bypass electrodes 44 and 54, and suppress a decrease in the extraction efficiency of charges from the semiconductor substrate 10.
< solar cell string >)
Fig. 3 is a rear view of a solar cell string 100 having a plurality of solar cells 1. The solar cell string 100 includes: a plurality of solar battery cells 1 arranged in a row along a first direction; and an internal connector 2 for connecting adjacent solar cells. In the solar cell string 100, the end portion on one side in the first direction of the solar cell 1 is arranged to overlap the surface side of the end portion on the other side in the first direction of the adjacent solar cell 1. The inner connector 2 is formed of an electrical conductor such as a metal wire, a metal foil, a metal braid, or a metal stranded wire, and connects the first pad electrode 43 of the solar cell 1 overlapped on the front surface side and the second bus bar electrode and the second pad electrode 53 of the solar cell 1 overlapped on the back surface side.
In the solar cell string 100, the overlapping width of the plurality of solar cells 1 in the first direction can be arbitrarily set within a range of an area required for connecting the interconnector 2 to the first pad electrode 43 of the solar cell 1 on the exposed surface side. Therefore, the solar cell string 100 can adjust the entire length in the first direction.
Further, if the lengths of the first pad electrode 43 and the second pad electrode 53 in the first direction are increased in order to increase the adjustment range of the overlapping width, the photoelectric conversion efficiency of the solar cell 1 may be lowered. Therefore, a plurality of types of solar cells 1 having different adjustable ranges of the overlapping width in the first direction may be prepared, and the solar cell to be used may be selected according to the required length of the solar cell string 100.
Solar cell Module
Fig. 4 is a cross-sectional view of a solar cell module M including a solar cell string 100. The solar cell module M includes: a plurality of solar cell strings 100 arranged side by side in the second direction; a plate-shaped surface protective material 200 covering the surface sides of the plurality of solar cell strings 100; a plate-like or sheet-like back surface protective material 300 covering the back surface sides of the plurality of solar cell strings 100; and a sealing material 400 filled between the surface protective material 200 and the back protective material 300.
The surface protective material 200 protects the solar cell string 100 by covering the surface of the solar cell string 100 with the sealing material 400 interposed therebetween. The surface protective material 200 is preferably made of a transparent and scratch-resistant material such as glass, polycarbonate, or acrylic resin, and has excellent weather resistance. Specifically, examples of the material of the surface protective material 200 include transparent resins such as acrylic resins and polycarbonate resins, and glass. The surface of the surface protective material 200 may be roughened or coated with an anti-reflection coating to suppress reflection of light.
The surface protective material 200 is preferably thick enough to have strength capable of maintaining the shape of the solar cell module M. Further, the use of the surface protective material 200 formed into a desired shape in advance can provide the solar cell module M of a desired shape.
The surface protective material 200 may be larger than the plurality of solar cell strings 100, the back surface protective material 300, and the sealing material 400 in plan view. The surface protective material 200 functions as a flange for mounting the solar cell module M to a desired device. That is, the solar cell module M can be mounted on the device by bonding the back surface of the outer edge portion of the surface protective material 200 to the device using an adhesive. When the surface protective material 200 has the same size as the back protective material 300 and the sealing material 400 in plan view, the back protective material 300 can be bonded to the device.
The surface protective material 200 may have a light shielding region that shields light at an outer peripheral portion. The light shielding region 201 is generally formed at a constant width along the outer edge of the surface protective material 200. The light shielding region prevents the adhesive agent from being deteriorated by the irradiation of sunlight through the surface protective material 200 to the adhesive agent for fixing the solar cell module M in a state where the solar cell module M is mounted to the device. In addition, the light shielding region 1 improves the beauty by shielding the mounting portion of the solar cell module M. The light shielding region can be formed by, for example, application of a black paint. As the black paint, a ceramic paint is generally used.
The solar cell string 100 is formed to have a length substantially equal to the length of the light-transmitting region inside the light-shielding region of the surface protective material 200 in the first direction. This increases the effective area of the solar cell string 100 that receives light, and prevents a decrease in photoelectric conversion efficiency due to a part of the solar cell units 1 that do not enter the end of the solar cell string 100. The plurality of solar cell strings 100 can be connected to each other by a wiring material (not shown).
The back surface protective material 300 is a layer for protecting the back surface side of the solar cell string 100. The material of the back surface protective material 300 is not particularly limited, but a material that prevents penetration of water or the like (has high water blocking property) is preferable. Specifically, the back surface protective material 300 is formed of, for example, a resin such as glass, polyethylene terephthalate (PET), acrylic resin, polyethylene (PE), olefin resin, fluorine-containing resin, or silicon-containing resin. The back surface protective material 300 may be a laminate of a resin layer and a metal layer such as aluminum foil. In addition, the color (light reflection characteristic) of the back surface protective material 300 when viewed from the front surface side is preferably similar to the color of the front surface side of the solar cell 1 in order to make the gaps between the solar cell strings 100 less noticeable and to enhance the appearance of the solar cell module M.
The sealing material 400 seals the solar cell string 100 in the space between the front surface protective material 200 and the back surface protective material 300, and suppresses degradation of the solar cell string 100 due to moisture or the like. The sealing material 400 is formed of a material having transparency and adhesion to the surface protective material 200 and the solar cell string 100. The material forming the sealing material 400 preferably has thermoplastic properties so that the gap of the surface protective material 200 and the solar cell string 100 can be sealed by hot pressing. Specifically, as a material for forming the sealing material 400, for example, a resin composition containing ethylene/vinyl acetate copolymer (EVA), ethylene/α -olefin copolymer, ethylene/vinyl acetate/triallyl isocyanurate (EVAT), polyvinyl butyral (PVB), an acrylic resin, a urethane resin, a silicone resin, or the like as a main component can be used.
The embodiments of the present invention have been described above, but the present invention is not limited to the above embodiments and various modifications and variations are possible. As an example, in the solar cell according to the present invention, the second terminal semiconductor portion and the second pad electrode, the first intermediate semiconductor portion and the first bypass electrode, the second intermediate semiconductor portion and the second bypass electrode, the first extension semiconductor portion and the first extension electrode, the second extension semiconductor portion and the second extension electrode, and the like can be omitted. In the solar cell according to the present invention, the lengths of the first and second pad electrodes in the second direction may be the same as the lengths of the first and second bus bar electrodes in the second direction.
Description of the reference numerals
Solar cell unit; an internal connector; a semiconductor substrate; a first semiconductor layer; a first main semiconductor portion; a first collective semiconductor portion; a first terminal semiconductor portion; a first intermediate semiconductor portion; a first elongate semiconductor portion; a second semiconductor layer; a second main semiconductor portion; a second collective semiconductor portion; a second terminal semiconductor portion; a second intermediate semiconductor portion; a second elongated semiconductor portion; 40. a first electrode pattern; first finger electrode; first bus bar electrode; first pad electrode; 44. a first bypass electrode; 45. a first elongate electrode; second electrode pattern; 51. the second finger electrode; second bus bar electrode; 53. the second pad electrode; 54. a second bypass electrode; 55. a second elongate electrode; solar cell string; surface protective material; backside protective material; sealing material; solar cell module.
Claims (5)
1. A solar cell unit is characterized in that,
the device is provided with: a semiconductor substrate; a first semiconductor layer and a second semiconductor layer formed on the back surface of the semiconductor substrate and having different conductivity types; and a first electrode pattern and a second electrode pattern, the first electrode pattern being laminated on the first semiconductor layer, the second electrode pattern being laminated on the second semiconductor layer,
the first semiconductor layer has: a plurality of first main semiconductor portions extending in a first direction and arranged at intervals in a second direction intersecting the first direction; a first semiconductor aggregate portion disposed on one side of the plurality of first semiconductor primary portions in the first direction and extending in the second direction; and a first terminal semiconductor portion connected to the other side of the first direction of the first collective semiconductor portion,
the second semiconductor layer has: a plurality of second main semiconductor portions extending in the first direction and arranged alternately with the first main semiconductor portions in the second direction; and a second semiconductor portion arranged on the other side of the plurality of second main semiconductor portions in the first direction and extending in the second direction,
the first electrode pattern has: a plurality of first finger electrodes laminated on the first main semiconductor portion so as to extend in the first direction; a first bus bar electrode laminated on the first collective semiconductor section; and a first pad electrode stacked on the first terminal semiconductor portion and connected to the first bus bar electrode,
the second electrode pattern has: a plurality of second finger electrodes laminated on the second main semiconductor portion so as to extend in the first direction; and a second bus electrode stacked on the second collective semiconductor portion.
2. The solar cell unit according to claim 1, wherein,
the first semiconductor layer further includes a first intermediate semiconductor portion extending in a second direction so as to connect an end portion of the first main semiconductor portion on the first direction side and the first terminal semiconductor portion, and the first electrode pattern further includes a first bypass electrode stacked on the first intermediate semiconductor portion and connecting the first finger electrode and the first pad electrode.
3. The solar cell unit according to claim 1 or 2, wherein,
the second semiconductor layer further includes a second terminal semiconductor portion connected to the first direction side of the second aggregate semiconductor portion, and the second electrode pattern further includes a second pad electrode stacked on the second terminal semiconductor portion and connected to the second bus bar electrode.
4. The solar cell unit according to claim 3, wherein,
the second semiconductor layer further includes a second intermediate semiconductor portion extending in a second direction so as to connect an end portion of the second main semiconductor portion on the first direction side and the second terminal semiconductor portion, and the second electrode pattern further includes a second bypass electrode stacked on the second intermediate semiconductor portion and connecting the second finger electrode and the second pad electrode.
5. A solar cell module is characterized in that,
the solar cell module includes a plurality of solar cell strings each including: a plurality of solar cell units of any one of claims 1 to 4; and an internal connector for connecting the solar cells to each other,
in the solar cell string, an end portion of the solar cell on the first direction side is arranged to overlap a surface side of an end portion of the adjacent solar cell on the other side in the first direction, and the internal connector connects the first pad electrode of the solar cell overlapping on the surface side and the second electrode pattern of the solar cell overlapping on the back side.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020-191811 | 2020-11-18 | ||
| JP2020191811 | 2020-11-18 | ||
| PCT/JP2021/038906 WO2022107542A1 (en) | 2020-11-18 | 2021-10-21 | Solar battery cell and solar battery module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116420233A true CN116420233A (en) | 2023-07-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202180075174.2A Pending CN116420233A (en) | 2020-11-18 | 2021-10-21 | Solar cell unit and solar cell module |
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| Country | Link |
|---|---|
| JP (1) | JPWO2022107542A1 (en) |
| CN (1) | CN116420233A (en) |
| WO (1) | WO2022107542A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012175065A (en) * | 2011-02-24 | 2012-09-10 | Sanyo Electric Co Ltd | Solar battery and solar battery module |
| JP5627054B2 (en) * | 2011-04-26 | 2014-11-19 | パナソニック株式会社 | Solar cell, junction structure, and method for manufacturing solar cell |
| US20140124014A1 (en) * | 2012-11-08 | 2014-05-08 | Cogenra Solar, Inc. | High efficiency configuration for solar cell string |
| DE112019004856T5 (en) * | 2018-09-28 | 2021-06-10 | Sunpower Corporation | SOLAR CELL WITH CIRCULAR FINGER |
| JP7467352B2 (en) * | 2018-10-02 | 2024-04-15 | 株式会社カネカ | Solar cell device and solar cell module |
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2021
- 2021-10-21 JP JP2022563652A patent/JPWO2022107542A1/ja active Pending
- 2021-10-21 CN CN202180075174.2A patent/CN116420233A/en active Pending
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| JPWO2022107542A1 (en) | 2022-05-27 |
| WO2022107542A1 (en) | 2022-05-27 |
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